package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

/**
 * 执行UPDATE语句
 */
public class JDBCDemo3 {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:8807/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root"
        );
        Statement statement = connection.createStatement();
        /*
            需求:将张三的密码改为666666，年龄改为18，昵称改为张三丰

            UPDATE user
            SET password='666666',age=18,nickname='张三丰'
            WHERE username='张三'
         */
        String sql = "UPDATE user " +
                     "SET password='666666',age=18,nickname='张三丰' " +
                     "WHERE username='张三'";
        System.out.println(sql);
        int num = statement.executeUpdate(sql);
        System.out.println(num > 0 ? "修改成功！" : "修改失败！");
        connection.close();

    }
}







